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2.1 the shuttle shall be made of natural and / or synthetic materials. From whatever material the shuttle is made, the flight characteristics generally shall be similar to those produced by a natural feathered shuttle with a cork base covered by a thin layer of leather.
2.2 feathered shuttle
2.2.1 the shuttle shall have 16 feathers fixed in the base.
2.2.2 the feathers shall have a uniform length between 62 mm to 70 mm when measured from the tip to the top of the base.
2.2.3 the tips of the feathers shall lie on a circle with a diameter from 58 mm to 68 mm.
2.2.4 the feathers shall be fastened firmly with thread or other suitable material.
2.2.5 the base shall be 25 mm to 28 mm in diameter and rounded on the bottom.
2.26 the shuttle shall weigh from 4.74 to 5.50 grams.
2.3 non-feathered shuttle
2.3.1 the skirt,or simulation of feathers in synthetic materials,shall replace natural feathers.
2.3.2 the base shall be as described in law 2.2.5
2.3.3 measurement and weight shall be as in law 2.2.2,2.2.3 and 2.2.6 however,because of the difference in the specific gravity and other properties of synthetic materials in comparison with feathers, a variation of up to 10 percent shall be acceptable.
5. Equipment and compliance
5.1 compliance
the badminton world federation shall rule on any question of whether any racket,shuttle or equipment or any prototype used in the playing of badminton complies with the specifications.such ruling maybe undertaken on the federation is initiative or on application by any party with a bona fide interest,includeing any player,technical official,equipment manufacturer or member association or member thereof.
5.2 additional equipment for para-badminton
for pora-badminton,a wheelchair or a crutch may be use.
5.2.1 a player is body may be fixed to the wheelchair witch and elastic belt.
5.2.2a wheelchair may be equipped with supporting wheels,which may extend beyond the main wheel.
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