用于0.25和0.5毫升两种凯苏式牛细管输精枪的保护，具有双重保险作用。外套前端圆滑，输精时不会划伤母牛子宫颈，亦无精液倒流和因推力大时将前端推开之虑。本外套经多次改进，质量已达国内外同类产品最高水平且使用效果更好，价格却是国内最低的！外套单支包装，20支一袋，100袋一箱。报价已包含国内普通包裹（或汽运零担发货）的价格。长450mm 管径5mm

蒋氏细管输精枪外套可用于目前市面上各种输精枪的保护。其独特之处在于1内塞固定在外套管前端并熔粘为一体，2外套前端圆滑且开口小，3外套为单支包装膜在输精时具有双重卫生保护作用。

Jiangs sheath can be used as a protecting cover for any marketed insemination guns. Its unique characteristics are1the inner plug is fixed to the front end of sheath and both melted together，2the front end is smooth round and with a small hole and，3the sheath is single packed by plastic membrane and this package makes the sheath with double protection when AI.