These are special purpose film caps from Japan and Teflon tin foil caps from France. The Teflon may be the ultimate coupling and bypass cap. 1000V rating allows use in many 211/845 circuits - check your operating voltages. These take a while to settle in but are ultimately smooth and extremely dynamic sounding. IMO better than silver caps. And...they are reasonably sized to fit tight places - 36mm long. External review: http://www.enjoythemusic.com/diy/0511/coupling_capacitors.htm

Image	Name	Price	Add to cart
n/a	Matching fee for capacitors	USD $1.00
	Obbligato film cap 1.0uF/630V (compact size: 24x16mm)	USD $2.25
	Obbligato film cap 1.0uf/630v (PPE)	USD $3.70
	Obbligato film cap 10.0uF/250V (compact size: 35x20mm)	USD $5.50
	Obbligato film cap 4.7uf/630v (PPE)	USD $6.75
	Obbligato film cap 10.0uF/630V (compact size: 44x28mm)	USD $7.00
	Obbligato film cap 10uf/630v (PPE)	USD $11.00
	Obbligato film cap 20uf/630v (PPE)	USD $14.00
	Obbligato Film Cap 22uF 35v	USD $16.00
	Obbligato 2.2uf/250vdc Tinfoil/film Coupling Cap	USD $19.50
	Teflon Tin Foil 0.047uF 1000V	USD $35.00
	Teflon Tin Foil 0.1uF 1000V	USD $42.00
	Teflon Tin Foil 0.22uF 1000V	USD $64.00
	Teflon Tin Foil 0.47uF 1000V	USD $95.00