I offer for sale a pair of power triodes type RV258 (KL72401) in a perfect working condition. The tube RV258 is a 100% equivalent for the tube RV218 These both tubes has been measured in really dynamic working condition with 800 V anode Voltage and - 80 V bias Voltage The anode current of both tubes is about 43 u. 40 mA and the dynamic slope is 1,8 mA/V and 1,7 ,A/V The parameter shown, that these tube are in a perfect condition Versand in Deutschland via DHL standard / German Post - Versandkosten in Deutschland - 7 EUR shipping in EU countries - 17 EUR , Far East and world wide - 46 EUR full insured.An international shipping world wide by DHL Express (takes 2-3 work days only) costs 52 EUR low insured or 72 EUR full insured