Allen 30mm XHL Extreme High Load Block Select (See Table Below):AL-2030-XHL-SV 30MM XHL DYNAMIC: SINGLE -SILV - EACH derating > 40 °C (-13

derating > 40 °C (-13 °F to 140 °F) Protection Rating IP21

Manufacturer Part Number: 1810-BSS

Manufacturer Part Number: TW2S

it allows the purging of 2 hydraulic steering systems before refilling

Manufacturer Part Number: F5000315036300000L

Allen 30mm XHL Extreme High Load Block Select (See Table Below):AL-2030-XHL-SV 30MM XHL DYNAMIC: SINGLE -SILV - EACH derating > 40 °C (-1330mm XHL Extreme high load block. The XHL is a new 30mm block with CNC machined, anodised aluminium cheeks, with a precision turned stainless steel sheave in a variety of dazzling colours. It was designed for exceptional performance in classes such as the International Moth where extreme loads can crush the bearing surfaces of traditional blocks; this is taken up by a new extreme high load bearing system. Tested by Team Allen sailors, the XHL is the