Through the spherical contact surface, DT Pro Head nipples align automatically with the angle of the spoke, which leads to a homogeneous power transmission. The special shape of the head prevents the nipple of tilting in the rim base, which is a great advantage for wheel building. Features-32 nipples weigh approximately 30 grams-Can be used in place of alloy Squorx Pro Head nipples when building DT rims that require Prohead nipples and washers (PHR washer is still required)-ProLock nipples contain a special adhesive compond which is activated when a spoke is threaded into the nipple, forming a durable bond Item Specifications-Color:Black-Length:12-Material:Brass-Spoke Diameter:2.0-Defined Color:Black