.syn_tuyau_h {
	position:absolute;
	background: linear-gradient(rgba(130, 130, 130,1), rgba(200,200,200, 1), rgba(130, 130, 130,1));
	padding:0px; 
	margin:0px; 
	border:1px solid rgba(130,130,130,1); 
	font-size:20pt;
	display:inline-block; 
	vertical-align: middle; 
	text-align:center;
}
	
.syn_tuyau_v {
	position:absolute;
	background: linear-gradient(90deg, rgba(130, 130, 130,1), rgba(200,200,200, 1), rgba(130, 130, 130,1));
	padding: 0px; 
	margin-top:0px; 
	border:1px solid rgba(130,130,130,1); 
	font-size:20pt;
 	display:inline-block; 
 	vertical-align: middle;
 	text-align:center;
}

.syn_tuyau_ha {
	position:absolute;
	background: linear-gradient(rgba(196,160,0,1), rgba(255,255,102,1), rgba(196,160,0,1));
	padding:0px; 
	margin:0px; 
	border:1px solid rgba(196,160,0,1); 
	font-size:20pt;
	vertical-align: middle; 
	text-align:center;
}
	
.syn_tuyau_va {
	position:absolute;
	background: linear-gradient(90deg, rgba(196,160,0,1), rgba(255,255,102,1), rgba(196,160,0,1));
	padding:0px; 
	margin:0px; 
	border:1px solid rgba(196,160,0,1); 
	font-size:20pt;
	display:inline-block; 
 	vertical-align: middle;
 	text-align:center;
}

.syn_tuyau_hp {
	padding:0px; 
	margin:0px; 
 	vertical-align: middle;	
 	display:inline-block; 
 	position: relative; 
 	top: -150%;
}
.syn_tuyau_vp {
	padding:0px; 
	margin:0px; 
 	vertical-align: middle;	
 	display:inline-block; 
 	position: relative; 
 	top: 20%;
 	left: -20%;
}