I'll be draining oil and thought I change o rings for the oil cooler lines as some seem to be leaking slightly. TPS wants £2.50 for 1 which is stupid. 
so before I go ahead and order them; are the rings specific spec for the oil cooler or general use o-rings will do?
Oil cooler o-rings; 034115427B (x4) £2.50 ish each
Oil cooler housing o-ring; 035115427 £2.50 ish each
Oil cooler housing o-ring; N0138165 (x2) £0.60p each
so before I go ahead and order them; are the rings specific spec for the oil cooler or general use o-rings will do? Oil cooler o-rings; 034115427B (x4) £2.50 ish each
Oil cooler housing o-ring; 035115427 £2.50 ish each
Oil cooler housing o-ring; N0138165 (x2) £0.60p each