PDI W-hold Hopup Bucking AEG (50° / 70°) Tokyo Marui (TM) PDI rubbers have two ribs

PDI rubbers have two ribs for improved air seal

HI-CAPA is all time flavor for Marui fans

Weight - 23g for both sights separately

made in Japan

Steel face mesh for lower face protection

PDI W-hold Hopup Bucking AEG (50° / 70°) Tokyo Marui (TM) PDI rubbers have two ribsPDI rubbers have two ribs for improved air seal. The design has two nubs with a channel in between, which helps center the BB in the barrel for more consistent hop application. From PDI: Compact, but it has high power This is new model packing of PDI. It has two ring ribs on the outer surface, and they improve airtight. And more, it has "W hold ledges". Two ledges in the packing are steady of the BB's trajectory. It made of nitrile rubber(Hs50), and